The steel wire rope manufacturing process has three basic points: drawing, twisting and rope closing. Each process has its own rules.
1. Drawing
Wire rope drawing refers to a steel wire rope manufacturing process in which the raw material is pickled, phosphated, peeled, and blanked, and pulled one or more times to change its molecular structure and make it reach the target diameter. After the steel wire is drawn, its molecular structure has been destroyed. Only tempering can restore the internal structure of the steel wire so that it can be drawn again. This way it is not easy to break and can be drawn to the strength we want.
2.Twisting
Steel wire ropes are divided into many types according to their uses, and there are great differences in the twisting process of each type. Among them, the surface contact round strand steel wire rope is made by drawing the line contact strands through a wire drawing die or a roller die by the traction force of the twisting machine. After the steel wire is twisted into strands, it goes through the processes of oiling, plating and winding. In order to ensure the safety and reliability of the use of steel wire ropes, it is most important that the steel wire ropes have sufficient strength.
3. Rope closing
The steel wire rope manufacturing process in which the rope strands are arranged in a spiral around the center line of the rope core on a rope closing machine. In a single-twist steel wire rope, the twist direction of the steel wires in each twisted layer around the rope core changes alternately, and the twist direction is determined by the twist direction of the outer layer of steel wires. Double-twisted steel wire ropes are usually made of 2, 3, 4, 6, 7, or 8 strands. It can reach up to 36 strands, has many varieties, and has a complex structure. It is the most widely used steel wire rope.
